Problem-Solving and Data AnalysisVery hardFilling time with a unit conversion
Problem-Solving and Data Analysis practice question
A tap delivers 3.5 litres of water per minute. How many minutes does it take to fill a tank with a capacity of 0.42 cubic metres? (1 cubic metre = 1,000 litres.)
Answer: 120
0.42 m³ = 420 litres, and 420 ÷ 3.5 = 120 minutes.
Common wrong answers
- If you answered 12
- 12 misplaces a decimal in the conversion.
- If you answered 1470
- 1,470 multiplies 420 by 3.5.
- If you answered 0.12
- 0.12 forgets to convert cubic metres to litres.
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